Roof drain



May 26, A. GORDON 2,284,416

' ROOF DRAIN Filed Aug. 15, 1940 2 Sheets-Sheet l 2a M 5727a! ATTORNEY;

May 26, 1942 A. GORDON ROOF DRAIN Filed Aug. 15, 1940 2 Shbets-Sheet 2 in NA.

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V/VY/ I INVENTOR. c'firfihur Gordon orngs:

Patented May 26, 1942 I 2,284,416 noon ita-in Arthur Gordon, Chicago, Application August 15, 1940; Serial No; 3521923 2 Claims. (.cl. 185-31) This invention relates in general to drainage devices, and more particularly to an improved type of roof drain.

A principal object of the invention is the provisionof a simplified roof drain which is adapted for use with any desired type of roof construction, and is completely leak-proof throughout.

Another important object of the invention is the provision of a roof drain which results in very material savings in time, labor and mate'- rials in its installation. v

A further important Object of the invention is the provision in a roof drain of novel means a i lawn ia eiife eii ,h e a sa disos d f a f rme la i q n su h enl r ed 'endportion, for a purpose to be later more fully V The main body portion I Z is adapted to be disposed in a suitable aperture providedinany f we? q netrus io r su h as a ci'ete slab, na a declg wood sheathing", or tile,

marble block, cementor terrazzo finish. To

end, the body portion i g is' provided with dual retaining means for securing the same to the roof structure, co'inpris ing the upper circumferfor rigidly securing the same to the roof, which also functions to prevent cracking and breaking away of the concrete adjacent to and surrounding the drain, when used in connection with a concrete slab type of roof construction.

Another object of the invention is the provision of a roof drain incorporating a readily ac cessible expansion joint connection with the drainage pipe therefrom as a part ofthe drain proper. I

A further object of the invention is the provision in a drain employing a, main strainer unit, l

roof structure and a drain therefor embodying the features of the invention; and I U Figure 2 is a similar view of a modified drain.

R.-eferring more particularly to Fig. '1, reference numeral ll indicates in general a roof drain embodying the features of the instant invention which comprises a main body portion 12', r a clamping ring 13, and a removable doin'e sh'a'ped strainer 14. The main body portion I2 is in the shape of a bowl having an outwardly extending, horizontally disposed flange 1'5 at its upper end, with an inwardly extending, annular flange" I6 disposed. intermediate the ends of the bowl portion and formed integrally therewith. The lower end of the main body portion l2 comprises a downwardly extending tube ll terminating at its lower end in an enlarged flange portion [8,

ential flange l5, and a plurality of hollow, lugs er eyelets 2| formed ihteraiiy with a disp d adjacent the lower en c l iof the bowl portion thereof. The eyelets 2| are spaced circumferen tially around the main body portion l2 and are adapted to e engages 37; a ummy bf wi-rs zz which are preferably connected to the usual re inforcing means employed in a concreteslab 23,

when such arocf structure is being used. The top flange It is provided with a plurality of spaced apertures 25 to accommodate screw/s25 which are adapted to rigidly secure the main bony portion l3 to the wood sheathing 26, if the latter is employed inthe roof. construction. In Fi 1 both fastening means 22 and zs re disclosed-for the, purpose of illustrating the optiona1 methods by which the mainbody portion l2 of the roof drain maybe secured to a roof of any particular type of construction.

'Inins'talling thereof drain u, it is the usual practice to first position the mainIbody portion |2f in its selected locationp'rior to thecornpletion of the roof structure, especially where a concrete slab construction is employed, and then com- .ple'te the} installation of the drain after an; other construction work hasbeenfini'shed. The in stant drain particularly lends itself to such installation, since.thelower end H. of the'main body portion) I' 3 extends sufiici'ently belowthe roof proper to ,clear any. type of ceiling which may be subsequently applied thereto. This is an extremely important advantage of the; instant construction, because it permits the p'ersonj installing the same. to do thef' job, with'out interference, at any time which may be convenient t0 him u h i 3 I g;

After co jpl'etion of the roof ,con'struction the clampingf ring l3m'ay, be secured to the main body portion 12' ofrth rocf rain H in the rei- V prises n inwardly eiitnding nnu ar flange 21 tion of the main body I2, and a horizontal, circumferentially disposed flange 29 at the upper end. The lower flange 21 is provided with a portion I2 is provided with a companion groove I or recess 33 disposed in vertical aligmnent with the flange 32. The roofing felt, paper, waterproofing membrane, or the like, 34 which is employed in the roof construction is adapted to extend downwardly between the upper end of the main body portion l2 and the clamping ring |3. Tightening of the bolts 3| will result in the flange 32 of the clamping ring |3 forcing this roofing tioning to provide a completely leak-proof and air-tight joint between the main body portion i2 and the clamping ring l3. Without the flange '32 and groove 33, leakage would result, in time, between the main body portion |2' and the clamping ring |3- solely from vibrations of the roof structure. -The flange '32 and groove 33 are so shaped, and'dimensioned that the roofing material used. The clamping ring I3 is also provided with anupwardly extending-flange 35 adjacent its outer edge having spaced notches 35 therein to permitdrainage from the upper surface of theroof structure, downwardly over the clamping ring l3, while acting as a stop or barrier for any gravel or slag which may be used on the surface of the roof.

The strainer I4 is a hollow dome-shaped device having 'a plurality of apertures therein to provide the desired drainage area, and is formed with a horizontally disposed flange 31 at its lower end. The flange 31 is provided with suitable weep holes 38, and is sufliciently smaller in diameter than-the inner diameter of the lower flange 21 of the clamping, ring |3 to permit readyremovability of the strainer M. The removable dome-shaped strainer |4 normally. rests upon the inward extending flange I6 of the mainv body portion |2,' as shown in the drawings. The drainage area provided by the apertures in the strainer |4 is-preferably greater than the outlet area of the lower tubular portion ll of the main body portion l2. The mounting of the strainer l4 as above 'describedgenables it to be removed at anytime for the purpose of cleaning 'out'any sediment which may accumulate between it and the exposed surface of the clamping ring l3, without necessitating removal of the latter or disturbance of the leak-proof connection between the clamping ring and the main body portion l2.

The upper end of a suitable drainage pipe 4| provide 'aleak-proof joint. A gasket 44- of any.

desiredmaterial'isinterposed between the en 'larged flange portion l8 of the tube I'I'and the 'material 34 into the groove 33, thus func- '30. material 34 will not be punctured orperforated thereby regardless ofthe characteristics of the drainage pipe 4|, and is held in position by a gland ring or sleeve 45. The sleeve 45 is secured to the flange l9 provided upon the tube I! by bolts46, extending through suitable apertures therein, and wing nuts 41. The members l8, l9 and 44 to 41 thus constitute an expansion joint which permits relative movement between the tube I1 and the drainage pipe 4|, while providing a leak-proof joint therebetween.

As will be readily understood, the above described roof drain II is adapted for use with any desired type of roof construction. The retaining means 2|, 22 are of particular importance where the drain is to be associated with a concrete slab roof. This is for the reasons that the main body portion I2 of the drain may be positioned in the desired location prior to the pouring of the slab 23, and the wires 22 which are connected to the usual reinforcing means employed with the slab-will efiectively prevent breaking away of the slab from the drain. A tight connection betweenthe concrete. slab and the drain is thus assured, and the usual difiiculty of cracking and breaking away of the slab adjacent to the drain is entirely eliminated. In fact, such retaining means is of particular advantage where the drain H is to be used as a floor drain, or in any other suitable location. V

The fact that only the main body portion |2 of the drain need be placed in position prior to complete construction of the roof and any ceiling which may be provided on the under surface thereof is of material importance, because it enables the person installing the drain to, do so at any desired time without interference by those doing othertypes of work on the building. The extension of the lower'tubular portion ll of the main body portion |2 of the drain well below. the lower. surface of any ceiling which may be applied to the under surface of the roof not only facilitates such installation of the drain, but also eliminates the necessity of working close to the roof in connecting the drainage pipe 4| thereto. Such connection is also greatly facilitated by the particular type of expansion joint provided, which enables connection thereof entirely from below the joint. The flange 32 and groove 33 insurea completely leak-proof arrangement; regardless of any subsequent vibrations of the building, or the like, and the clamp: ing ring |3 eliminates the necessity of using metal flashing of any kind. It will thus be seen that the instant roof drain provides material savings in material, as well as in time and labor, in its installation,

In Fig. 2, a modified'construction of the drain is illustrated which is indicated generally by ref-. erence numeral Ill and, like the drain hereinbefore described, is adapted to be mounted in any suitable type of roof, floor or other construction. The drain I comprises a main body portion H2, a dome-shaped strainer H4 and an auxiliary strainer I4]. The main body portion H2 is shaped somewhat similarly to the body portion |2 of the drain terminating at its upper end in a horizontally disposed flange H5 and v atits'lower end in a downwardly extending tube H1. The tubular portion 1 isprovided at its lower end with an enlarged flanged portion 8 and a circumferential, horizontally disposed flange 9 formed adjacent thereto.

Themain body portion I I2 is adapted to be disposed in a suitable aperture provided in any desired type of construction in the same manner ashas previously been described relative to the the supporting structure.

drain II. To this end, the main body'portion I I I2 is provided with dual retaining means for securing the same to the supporting structure, comprising the upper circumferential flange H5, and. an intermediate flange providing outwardly extending lugs or eyelets I2I. The eyelets I2I are adapted to be engaged by a plurality of 'wires 22 which are preferably connected to the usual reinforcing means employed in the concrete slab 23, when the drain is mounted in'such a structure. The top flange H is provided with a plurality of circumferentially spaced apertures I24 to accommodate screws I which are adapted to rigidly secure the main body portion II2 to the wood sheathing 26, if the latter is employed in In Fig. 2, the supporting structure at the left side of the drain III is shown as comprising a concrete slab 23, whereas that at the right side of the drain is shown as comprising not only the slab 23, but also the wood sheathing 26. From the previous description herein, it will be readily understood that the drain I II is adapted to be installed in the same manner as the drain I I.

The modified drain II I does not incorporate a clamping ring similar to the ring I3 of the drain II, nor is the main strainer II4 loosely mounted upon the main body portion II2, as is the strainer I4 of the drain II. Rather, the

strainer I I4 is provided with a substantially horizontal flange I21 at its lower end which rests upon and is secured to the upper flange H5 of the main body portion II2 by suitable screws I3I which are threaded into tapped apertures provided in the flange H5. This flange I21 of the dome-shaped strainer H4 also performs the function of the clamping ring I3 of the drain II of insuring a leak-proof connection with the main body portion II2. This function is accomplished by a downwardly extending annular flange I32 provided on the under surface of the flange I21 and a companion groove or recess I33 disposed in vertical alinement with the flange I32 in the upper surface of the flange N5 of the main body portion II 2. This arrangement is similar to the flange 32 and recess 33 of the drain I I. The roofing felt, paper, water-proofing membrane, or the like, 34 which is employed in the supporting construction is adapted to be disposed between the flanges H5 and I21 and the flange I32 and recess I33. Consequently, securing of the dome-shaped main strainer to the main body portion II 2 by means of the screws I3I will resuit in the flange I32 forcing the roofing material 34 into the groove I33, thus functioning to provide a completely leak-proof and air-tight joint between the main body portion H2 and the flange I21 of the strainer H4.

The flange I21 of the strainer II 4 also performs another function of the clamping ring I3 of the strainer II, i. e., that of acting as a stop or barrier for'any gravel or slag which may be used on the upper surface of the supporting structure. To this end, the flange I21 terminates at its periphery in an upwardly extending flange I35 having spaced notches I33 therein. In other respects, the dome-shaped strainer H4 is similar to the strainer I4 of the drain I I. The strainer II 4 is also'provided in its lower flange I21 with suitable weep holes I38, similar to the weep holes 38 of the strainer I4.

The tubular lower end I I1 of the drain III is adapted to be connected to the drainage pipe 4| in exactly the same manner as the tubular lower end of the drain II, the flanges H8 and H9 cooperating with the sleeve 45, bolts 46 and wing nuts 41 to provide an expansion joint which permits relative movement between the tube I I1 and the drainage pipe 4I while providing a leak-proof joint therebetween.

The drain II4 incorporates an additional feature not provided in the drain I4. This comprises the auxiliary strainer I4I which is in the shape of an inverted, flared ring adapted to engage the outer periphery of the dome-shaped portion of the main strainer H4 at its upper end and the junction between the flanges I21 and I35 of the strainer at its lower end, The auxiliary strainer MI is thus removably mounted upon the main strainer H4, and is provided with a plurality of circumferentially spaced slots I42. The auxiliary strainer I4I thus functions to prevent clogging of the main strainer II4 by any foreign matter .which may be carried to the drain, and is adapted to be readily removed to facilitate cleaning of-the drain and removing of such foreign matter. The advantage of this construction is that even during cleaning of the drain II4, no foreign matter will be permitted to enter the main portion II2 thereof.

It is thought that the invention and many of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from th spirit and scope of the invention or sacrificing all of its material advantages, the forms hereinbefore described being merely preferred embodiments thereof.

I claim:

'1. A drain, comprising a main body portion adapted to extend through a supporting structure, a main strainer member rigidly secured to said body portion, and an auxiliary strainer member surrounding and removably mounted upon the lower portion of said'main strainer member.

2. A roof drain, comprising a main body portion, a main strainer, member rigidly secured to said body portion and having a'dome portion extending upwardly therefrom and a bottom horizontal flange terminating in an upstanding gravel stop ring, and an auxiliary strainer member in the form of a flared ring adapted to slidably engage the outer surface of said dome portion at its upper edge and the inner surface of said gravel stop ring at its lower edge to'prevent clogging of said main strainer by any foreign matter carried to the drain. 7

ARTHUR GORDON. 

